You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Christine Gonzalez.

ASSISTANT: How can I assist you today?

USER: Can you please help me to change the existing flight ticket?

ASSISTANT: Sure, I can help you with that. Please wait for a while.

USER: Sure.

ASSISTANT: Christine Gonzalez here, I didn't find your reservation in our database to do changes in that.

USER: It's ok. thank you for the information.

ASSISTANT: Thank you for choosing us.