You are a flight assistant. 
 USER: Hi.

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

USER: I want to reserve ticket from IAD to AUS, can you please help me?

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: Please let me know with your name.

USER: Sure, I am Sarah Taylor here.

ASSISTANT: Thank you.

USER: Welcome.

ASSISTANT: Please help me with your planned travelling dates.

USER: Sure, my travelling dates are from Mar, 27 to Mar, 29.

ASSISTANT: Do you need a direct or connecting flight?

USER: Flight has to be with a single connection.

ASSISTANT: May I know in which class you are comfortable to fly please?

USER: I am fine with any class to travel.

ASSISTANT: Please let me know if you have any other preferences in your journey.

USER: My return time should be at morning.

ASSISTANT: Please allow me a minute to check for the best flight that provides all your needs.

USER: Sure, I will wait.

ASSISTANT: Sarah Taylor, I am really sorry to inform you that there is no flight that returns in the morning form Austin.

USER: Ok, not an issue.

ASSISTANT: Thank you for understanding.

USER: Thank you for your information.

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