You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I am Nancy Mitchell, want to travel from ORD to LGA. Please help me in booking my ticket.

ASSISTANT: Can I know your travel dates?

USER: Sure, my travelling dates are from 02/20 to 02/22.

ASSISTANT: Please give me a minute.

USER: Sure.

ASSISTANT: The flight 1021 of UA airlines is available on your requested dates. Shall I Proceed?

USER: Yes, please proceed with the booking.

ASSISTANT: Your ticket is booked successfully.

USER: Thank you for your help.