You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Melissa Garcia here.

ASSISTANT: How may I aid you?

USER: I want to visit LGA, can you please book me a flight ticket from JFK?

ASSISTANT: Sure, may I know your travel dates please?

USER: Sure, my trip dates are July 15th and 17th.

ASSISTANT: Do you have any specifications?

USER: My return time must be in the evening.

ASSISTANT: Do you need any halt in between?

USER: I need a single connecting flight.

ASSISTANT: Thank you for waiting. Sorry, there are no flights in this route as per your travelling details.

USER: Ok, not an issue. Anyways, thank you for the information.

ASSISTANT: Thank you for reaching us.