You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Jerry Johnson here.

ASSISTANT: How can I assist you today?

USER: Can you please help me in doing some modifications in my recent reservation? As my planned trip has been postponed to some other dates.

ASSISTANT: Sure, I will help you with that. Please give me a moment.

USER: Sure, I'll wait for your response.

ASSISTANT: Thanks for waiting, there is no reservation found under your name.

USER: Oh! May be I have done a wrong booking. Thank you anyways.

ASSISTANT: Welcome, have a great day.