You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. I am happy that you have contacted us. How may I assist you today?

USER: I would like to attend music concert at Philadelphia, can you please help me to reserve ticket from SEA?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Please help me with your name.

USER: Sure, I am Nicholas Walker here.

ASSISTANT: Thank you. Do you prefer to have a break in between your journey?

USER: No, Thank you for asking.

ASSISTANT: Please let me know with your preferred depart and arrival time to fly.

USER: I Would like to depart at evening in my journey.

ASSISTANT: Please help me with your planned depart and arrival dates of journey.

USER: Ok, my planned travelling dates are May, 30 and Jun, 01 respectively.

ASSISTANT: Do you have any other preferences in your journey?

USER: No, thank you for asking.

ASSISTANT: Please allow me a minute.

USER: Sure, I will wait.

ASSISTANT: Thank you. Nicholas Walker, I am really to inform you that there are no flights being operated on your preferred travelling dates.

USER: Ok, not an issue.

ASSISTANT: Thank you for understanding.

USER: Thank you for your information.

ASSISTANT: Thank you for reaching us. Have a wonderful day.