You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

USER: I need to change my reservation as my plan to go for trekking got postponed. Can you help me?

ASSISTANT: Can you please help me with your good name?

USER: I am Melissa Gonzalez.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry, there was no reservation done on your name.

USER: Ok fine, thanks for your response.

ASSISTANT: Thank you for choosing our service.