You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Nicole White here.

ASSISTANT: How can I aid you?

USER: I need to reserve my flight ticket,can you please help me?

ASSISTANT: Sure, I will help you with this.

USER: I want to start my journey on 07/11 and return back Los Angeles on 07/13.

ASSISTANT: May I know your nearest airport codes please?

USER: My preferable travelling airline code are from IAD to LAX.

ASSISTANT: Wait for a while please.

USER: Sure.

ASSISTANT: UA airlines is available on your route with a ticket fare of 200. Can I proceed  with your ticket booking?

USER: Ok, you can book it.

ASSISTANT: Your ticket is booked with flight-1010.

USER: Thank for your service in booking my flight ticket.

ASSISTANT: Thank you  for approaching us.