You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Cynthia Collins here. Can you help me in booking the ticket from CLT to IAH?

ASSISTANT: Sure, on which dates you are willing to travel?

USER: My planning dates are from 05/226 to 05/28.

ASSISTANT: Ok, please wait for a while I will check for the best service on your route.

USER: Ok.

ASSISTANT: Sorry to say, I did not find any flights on your route.

USER: That's fine. Anyway, thank you for your help.

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

USER: You are welcome.