You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I render you?

USER: Could you help me in changing my existing reservation?

ASSISTANT: Sure, may I know your good name?

USER: I am Catherine White.

ASSISTANT: Thank you for providing your name, please hold on.

USER: Sure, take your time.

ASSISTANT: You have a reservation on your name. Please, share your journey dates.

USER: My trip dates are from 04/21 to 04/23.

ASSISTANT: Kindly, mention your airport codes.

USER: My airport abbreviates are TX - DFW to WA - SEA.

ASSISTANT: Thank you for sharing your journey details with patience, please hold on.

USER: Ok.

ASSISTANT: You have a flight with airline Delta and flight number is 1017 with 1 connection and price is 200.

USER: Please proceed to book.

ASSISTANT: Your reservation is done.

USER: Thank you for your response.

ASSISTANT: Than you for reaching us, have a safe journey.