You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you today?

USER: I would like to attend my mother birthday celebration at Minneapolis, can you please reserve ticket from DEN to MSP?

ASSISTANT: Sure, I will help you. Please help me with your name.

USER: George Phillips here.

ASSISTANT: Please help me with your planned travelling dates.

USER: Sure, my planned travelling dates are May, 07 and 09 respectively.

ASSISTANT: Do you need a break in your journey?

USER: I would be comfortable with single stop over.

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

USER: No, thank you for asking.

ASSISTANT: Please allow me a minute. George Phillips, I am really sorry to inform you that there are no flights available for your journey.

USER: Sure, I will wait.

ASSISTANT: Thank you.

USER: It's ok, thank you for your service.

ASSISTANT: Thank you for reaching us. Have a great time.