You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Actually I am an old person and I don't know how to modify a flight ticket that is booked by my son in the last week but suddenly I got admitted in hospital with a typhoid fever, so I am unable to travel the trip now. Can you please modify my travel dates in the past ticket?

ASSISTANT: Sure, I can help you with that. May I know your good name please?

USER: Thank you. My name is Jennifer Edwards.

ASSISTANT: Ok, please wait for a while.

USER: Ok, take your time.

ASSISTANT: Jennifer, there is no reservation found under your name to do changes in that.

USER: It's ok, not a problem with that. Anyways thank you for your help.

ASSISTANT: Thank you for reaching us.

USER: Welcome.