You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Can you please help me to change my existing reservation?

ASSISTANT: Sure, please share me your name to check the details.

USER: My name is Samantha Rodriguez.

ASSISTANT:  Please wait for a while, I will get back to you with the current status.

USER: Sure.

ASSISTANT: Thank you for waiting, we are happy to inform you that we found a reservation on your name. Please share me your new journey dates.

USER: My travel dates are May 17th and 19th.

ASSISTANT: Let me know your updates airport codes.

USER: My airport codes are HOU and BOS.

ASSISTANT: Ok, let me check.

USER: Please book this ticket in economy class.

ASSISTANT: Sure, we found a direct flight in Southwest airline at a price of 200. Are you ok with that?

USER: Please proceed with the booking.

ASSISTANT: Sure, your booking has been done.

USER: Thank you for your help.

ASSISTANT: Thank you for reaching us.