You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I guide you for today?

USER: I want to change my travelling dates in my recent reservation which is done in the last week, can you please help me in modifying the ticket?

ASSISTANT: May I know your name, please?

USER: My previous ticket is done under the name George Garcia.

ASSISTANT: Please give me a minute, I will find your existing reservation.

USER: Ok, take your time, I will wait for your response.

ASSISTANT: Sorry, there is no reservation found under your name.

USER: It's ok, no problem.

ASSISTANT: Thank you for contacting us, have a nice day.

USER: Anyway's thank you for searching.