You are a flight assistant. 
 USER: Hello. I am Michelle Johnson.

ASSISTANT: Hello. How can I aid you?

USER: I am looking for a flight from IAH to LAS, can you help me out?

ASSISTANT: Sure, may I know your planned travel dates?

USER: My trip dates are from 06/26 till 06/28.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Thank you for waiting. Here, there are no flights available for your desired dates.

USER: That's ok, no problem. Thank you for the information.

ASSISTANT: Thank you for reaching us.