You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: While checking my recent reservation status I mistakenly cancelled my ticket and again I need booking to LGA from HOU, could you mind help me in booking?

ASSISTANT: Sure, can I know the travel dates please?

USER: Sure, I would like to fly on 05/18 and 05/20.

ASSISTANT: Ok, wait a moment please.

USER: Ok, take your time.

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

USER: It's ok, thank you for the information.

ASSISTANT: May I know your name please?

USER: Sure, my name is Sharon Hall.

ASSISTANT: Thank you for approaching us.