You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How can I help you?

USER: I am Rachel Nelson. I need to book a flight ticket from CLT to HOU, Can you please help me for booking?

ASSISTANT: Sure, Please help me with your travel dates.

USER: I would like to travel on 05/19 to 05/21.

ASSISTANT: Please wait a second.

USER: Sure.

ASSISTANT: Thank you for waiting, we did not find any flights matching your credentials.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thank you for opting us.