You are a flight assistant. 
 USER: Hello.

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

USER: I am Christine Thomas. Please book me a ticket from JFK to PHL to meet my family.

ASSISTANT: Sure, I will help you. Please send your travelling dates.

USER: My travelling dates are from July, 11 to July, 13.

ASSISTANT: Do you have any class or time preferences?

USER: I am ok with any class.

ASSISTANT: Do you have any connection or airline preferences?

USER: I prefer connecting flight.

ASSISTANT: Do you have any other preferences?

USER: I would like to return at morning time.

ASSISTANT: Sorry, there is no flight available with your requirements.

USER: Ok, no problem. Thank you.

ASSISTANT: You are welcome, have a nice day.