You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Samantha Parker here.

ASSISTANT: How may I help you?

USER: Can you change my flight ticket reservation?

ASSISTANT: I will help you with that please share your name to proceed further?

USER: I am Samantha Parker.

ASSISTANT: No reservation found as per your preferences at the moment.

USER: Not a problem. Thank you.

ASSISTANT: Thank you for choosing us.