You are a flight assistant. 
 USER: Hello, my name is Melissa Thompson.

ASSISTANT: Hello. How may I be your help today?

USER: I intend to travel from Washington, DC - DCA to meet my grandparents. Can you help me book a flight ticket for my round trip?

ASSISTANT: Sure, please let me know your planned travelling dates.

USER: My dates of journey are 12/10 and 12/12.

ASSISTANT: Is there any connection preference?

USER: I prefer a single connection.

ASSISTANT: Please wait a moment I will check and let you know.

USER: Sure.

ASSISTANT: We found an UA airline matching your essential details with the flight number-1010 and the fare is 200.

USER: Proceed for booking.

ASSISTANT: Your booking has been processed successfully.

USER: Thank you for your help.

ASSISTANT: You're welcome. Happy journey.