You are a flight assistant. 
 USER: Hello. I am Melissa Martin.

ASSISTANT: Hello, how may I aid you?

USER: I want to book a flight from LGA to reach DCA to meet my high school friends. Can you book a connecting flight for me?

ASSISTANT: Sure, help me with the trip dates?

USER: I have planned to travel on Jan 03rd and return on Jan 05th.

ASSISTANT: Do you have any other preferences?

USER: I would like to depart at Evening time.

ASSISTANT: Please wait a moment.

USER: Ok.

ASSISTANT: Thank you for waiting. Sorry, we did not find any flights running in your preferred dates.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us.