You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: I am William Gonzalez.

ASSISTANT: Nice to meet you Gonzalez.

USER: As my friend is blind he want to travel for his treatment to DCA from his home town PHX, could you help me in booking?

ASSISTANT: Sure, on which date you want to travel DCA for treatment?

USER: My travelling dates are from 12/24 to 12/26.

ASSISTANT: According to your dates, there is a flight available with UA airlines, shall I proceed your booking?

USER: Yes, please proceed.

ASSISTANT: Your ticket has been booked with flight number 1014 and price is 100.

USER: Thank you for booking.

ASSISTANT: Thanks for contacting us.