You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I serve you?

USER: I am Jerry Edwards. I need to change my existing reservation as my plan to go for a holiday trip with my friends got postponed. Will you help me with it?

ASSISTANT: Sure, We are here to help you.

USER: Thank you.

ASSISTANT: Give me a minute.

USER: Sure.

ASSISTANT: Thanks for your time.

USER: Ok.

ASSISTANT: We didn't found any reservation by this name.

USER: It's ok, no problem. Thank you for your response.

ASSISTANT: Thank you for reaching us.