You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help full to you?

USER: Nancy Taylor here. I am willing to book a flight ticket in the month of April. Can you please assist me to book a flight ticket?

ASSISTANT: Yes, I am happy to help you. May I know the dates of your trip?

USER: Sure, my dates of trip I have planned are 04/02 and 04/04.

ASSISTANT: Please help me in providing your regional airport codes.

USER: Thank you for considering my request.

ASSISTANT: Please wait for moment.

USER: My source airport code is IAH and destination code is PHX.

ASSISTANT: Ok, I am unable to find a flight on the dates the dates which you have provided to book the ticket.

USER: Not an issue, I will go with another resources. Anyway thank you for the information.

ASSISTANT: Ok, thank you for reaching us and have a nice day.

USER: You are welcome.