You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I best serve you today?

USER: Nancy Nelson is here. Can you please help me in booking a flight ticket from LGA to JFK?

ASSISTANT: Sure, please share me your trip dates.

USER: My trip dates are Nov 24th and Nov 26th.

ASSISTANT:  Do you need direct flight or connecting flight?

USER: I am ok with both the flights.

ASSISTANT: May I know your class preferences?

USER: I am flexible to travel with any class.

ASSISTANT: Is there any time concern for you?

USER: Yes, the depart time should be evening.

ASSISTANT: Sorry to say that, there are no flights available on the routes of your journey.

USER: Ok, not an issue.

ASSISTANT: Thank you for reaching us.

USER: Thank you.