Hi.
user
Hello.
assistant
I am Daniel Allen.
user
How can I assist you today?
assistant
I would like to change my existing reservation, so can you help me for that?
user
Sure, please allow me a moment to check for the availability of flight. Daniel, there is no reservation found under your name.
assistant
Oh! It's ok, no problem. Thank you for your services.
user
Thank you for contacting us.
assistant