You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Cynthia Campbell.

ASSISTANT: Cynthia, how may I help you?

USER: I want to fly from LAS to HOU. Can you book a flight ticket for me?

ASSISTANT: Sure, I am happy to help you. Can you please tell me your travel dates?

USER: I want to travel on 07/05 and 07/07.

ASSISTANT: Ok, please wait for a while.

USER: Ok, take your time.

ASSISTANT: Sorry Cynthia, there are no flights available on your preferred dates.

USER: That's ok. Anyways, thank you for your help.

ASSISTANT: You are welcome, thank you for contacting us.