You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Betty King here.

ASSISTANT: How can I aid you at this moment?

USER: Actually, I have planned for a direct flight because of emergency. Can you please help me out with booking of a flight ticket on 05/03?

ASSISTANT: Sure, I am happy to help you in booking flight ticket. Can you please share your airport code names for booking flight ticket?

USER: Thank you. I will prefer IAD and PHX as my origin and destination airport codes respectively.

ASSISTANT: Is there any return trip that your planning to IAD?

USER: Yes, I would like to return on 05/05.

ASSISTANT: Just give me a moment, I will check is there any flight available or not in this route as per your requested dates.

USER: Ok, take your time.

ASSISTANT: Sorry no flights available in this route as per your requested dates.

USER: Oh! Sad to hear that. Anyway, thank you for the information.

ASSISTANT: Thank you for reaching us, have a nice day.

USER: Welcome.