You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I have no funds at present to travel to my home town. So, I would like to change my existing reservation. Can you help me in this?

ASSISTANT: Sure, can you provide me your name to check the reservation details?

USER: I guess I have booked the ticket in the name of Jessica Rodriguez.

ASSISTANT: Sorry Jessica Rodriguez, there is no reservation found in our data base.

USER: That's fine, anyways, thank you for the information.

ASSISTANT: Would you like to know anything else?

USER: No, thank you for the service.

ASSISTANT: Ok, thank you for reaching us.