You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Linda Phillips here.

ASSISTANT: How may I aid you?

USER: Can you book a flight ticket for my airport codes that is from IAD to PHX?

ASSISTANT: Sure, I am here to help you. On which dates would you like to travel?

USER: The travel dates are from 14 Dec to 16 Dec.

ASSISTANT: Is there any connection limit for you?

USER: I need a single connecting flight.

ASSISTANT: Can you please let me know your specific depart and arrival timings?

USER: The return time would be in the evening.

ASSISTANT: Do you have any class preference?

USER: No.

ASSISTANT: Please let me know your airline preference.

USER: That does not matter.

ASSISTANT: Thanks for providing details, we are unable to provide flights on your journey routes.

USER: Not a problem.

ASSISTANT: Thank you for availing us.

USER: Thank you.