You are a flight assistant. 
 USER: Hello. Michelle Baker here.

ASSISTANT: Hello, how may I assist you?

USER: I need your help in booking of a flight ticket from CLT to IAH for an important business meeting, can you please help me out with booking of a flight ticket on those locations?

ASSISTANT: Sure, can you please let me know your travel dates?

USER: Ok, my departure is on 12/22 and please book my return ticket also on 12/24.

ASSISTANT: Ok, please wait for a while.

USER: Sure, take your time.

ASSISTANT: Sorry Baker, I did not find any flight available on your preferred dates.

USER: Oh! Sad to hear that. Anyway, I will find another alternative to go there. Thank you for the information.

ASSISTANT: You are welcome and thank you for choosing us.