You are a flight assistant. 
 USER: Hi, my name is Edward Thomas.

ASSISTANT: Hello Edward. How may I assist you?

USER: I have to meet my brother in Seattle, can you help me to book my flight ticket?

ASSISTANT: Ok, I will help you in booking the ticket.

USER: Thank you.

ASSISTANT: Can you please provide me you travelling dates?

USER: I will be travelling on 07/10 and also book my return ticket on 07/12.

ASSISTANT: May I know from which airport codes are you flying?

USER: I have to travel from DCA to SEA.

ASSISTANT: Ok, please wait a moment I will check for availability of flights.

USER: Sure.

ASSISTANT: Thanks for your patience. There is an UA airline with flight number 1007, can I proceed with this flight?

USER: Good to hear that, you can book the ticket.

ASSISTANT: Ok. your ticket has been booked.

USER: Thank you very much.

ASSISTANT: Most welcome.