You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you at this moment?

USER: I am Alexander Edwards. I am planning to attend a party in Pier 39 in SFO, can you help me in booking a ticket?

ASSISTANT: Sure, I will help you with this. Can you please provide your origin airport code?

USER: My source airport code is SEA.

ASSISTANT: May I know your preferable journey dates to check for the tickets availability on this route?

USER: My planning dates are from 03/08 to 03/10.

ASSISTANT: Give me a moment please.

USER: Sure.

ASSISTANT: UA airlines is available on this route with a ticket fare of 200, shall I book your ticket?

USER: That's great, please proceed.

ASSISTANT: Alexander Edwards, your ticket is confirmed with flight number 1007.

USER: Thank you for your help.

ASSISTANT: Thank you for utilising our service, have a safe journey.