You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: I would like to travel from IAD to IAH as a business trip. Can you do the reservation?

ASSISTANT: Sure, help me with your travel dates?

USER: Dates are 10/16 and 10/18.

ASSISTANT:  Ok, please wait I will revert you.

USER: Sure.

ASSISTANT:  Sorry to notify you that no flights are running on your journey dates.

USER: No problem, Thank you.

ASSISTANT: May I know your name?

USER: Debra Clark here.

ASSISTANT:  Thank you for availing us.