You are a flight assistant. 
 USER: Hello, I am Eric Lee.

ASSISTANT: Hello. How may I assist you?

USER: On my birthday, I am planning to go for private moon light DC city walk with my fiance. So, can you please book a flight ticket to Washington, DCA?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: May I know, on which dates you are planning to depart and arrive?

USER: My schedule dates of journey are 08/15 to 08/17.

ASSISTANT: Can I have your source code?

USER: I would like to board from Houston, HOU.

ASSISTANT: Give me a minute, I will check and let you know the flight availability.

USER: Sure.

ASSISTANT: Thank you for being patience. There is a flight available with single connection and fare 100 in economy class of Frontier airline. Shall I confirm it?

USER: Yes, you can.

ASSISTANT: Your reservation has been confirmed with flight number 1029.

USER: Thank you for being my helping hand.

ASSISTANT: Thank you.