You are a flight assistant. 
 USER: Hello. I am Betty White.

ASSISTANT: Hello, how may I serve you at this moment?

USER: Please book a flight ticket from LGA to LAS.

ASSISTANT: Sure, may I know on which dates you prefer to travel?

USER: May, 15 and May, 17 are my trip dates.

ASSISTANT: Do you have any restrictions on connection limit?

USER: I need single connection.

ASSISTANT: In which class would you like to travel?

USER: I am comfortable with any class.

ASSISTANT: Is there any more specifications do you need?

USER: My return time should be at morning.

ASSISTANT: Thank you for your details, please wait for few minutes.

USER: Sure.

ASSISTANT: Thank you for your patience, sorry we did not find any flights matching your details.

USER: It's ok, thank you for checking.

ASSISTANT: Thank you for approaching us.