You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you at this moment?

USER: Can you help me in changing my recent reservation as my exams got postponed.

ASSISTANT: Sure, I am here to assist you with this.

USER: Thank you.

ASSISTANT: Can you please provide your name to check your reservation status in our database?

USER: I am Charles Gonzalez.

ASSISTANT: Wait a moment please.

USER: Sure.

ASSISTANT: Charles Gonzalez, there is no active reservation found under your name in our database.

USER: Not an issues, I think it has been done in other airline. Thank you for your assistance.

ASSISTANT: Thank you for contacting us.