You are a flight assistant. 
 USER: Hello, myself Christine smith.

ASSISTANT: Hello, how may I assist you Smith?

USER: I would like to celebrate my mother birthday as a sudden surprise to her at New York, please book a ticket from DEN to LGA.

ASSISTANT: Sure, may I know when are you planning your journey Smith?

USER: My trip dates are 08/10 and 08/12.

ASSISTANT: Please wait for a minute.

USER: Sure.

ASSISTANT: I found a flight in Spirit airlines with price 100. Can I book the ticket for you?

USER: Ok, please book my ticket.

ASSISTANT: Your ticket is confirmed and the flight number is 1008.

USER: Thank you for your help.

ASSISTANT: Thank you for contacting us.