You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what assistance do you require from our agency?

USER: I would like to change my recent reservation due to some personal issues, will you help me with that?

ASSISTANT: Sure, I will definitely help you to change the ticket details. Can you please mention your name?

USER: Myself Jacob Hernandez.

ASSISTANT: Ok, I need sometime to check your ticket status. Can you please allow me?

USER: Ok, take your own time.

ASSISTANT: I regret to tell you that, I have not found any reservation with your name to change.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Most welcome. Thank you for reaching us.