You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Jack Evans.

ASSISTANT: Jack Evans. How may I help you?

USER: I need to change my reservation as my records submission date got postponed. Can you help me?

ASSISTANT: Please give me some time to check your ticket status.

USER: Sure.

ASSISTANT: Sorry, found no reservation by the name Jack Evans.

USER: That's Ok, thanks for your assistance.

ASSISTANT: Thank you for approaching us.