You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: I made a reservation earlier to attend a meeting. Due to some technical issues it has been postponed. Can you please change my existing reservation?

ASSISTANT: Sure, can you share me your name?

USER: Jessica Walker is my name.

ASSISTANT: Ok, wait for some time.

USER: Sure.

ASSISTANT: We found reservations on your name.Can you share me your new journey details?

USER: I would like to depart on 07/13 and return on 07/15. I want to fly from CLT to ATL.

ASSISTANT: Ok, wait for some time.

USER: Sure.

ASSISTANT: Unfortunately there is no flights found on your details.

USER: Ok, it's not a problem. Thanks for your response.

ASSISTANT: Thanks for choosing us.