You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: I want to change my existing reservation which is done recently due to some problems, can you please help me in this?

ASSISTANT: Can I know your name please?

USER: Sure, my name is Ashley Walker.

ASSISTANT: Please wait.

USER: Sure, I will wait.

ASSISTANT: I have found your reservation, may I know your travelling dates?

USER: My planned dates of journey are from Jun, 07 to Jun, 09.

ASSISTANT: Can I know your travelling airport codes?

USER: Yes, my respective airport codes are from MSP to CLT.

ASSISTANT: Do you have any other preference?

USER: Yes, I want to fly in a connecting flight.

ASSISTANT: I have found a flight ticket with fare 100 and 1000 as flight number. Shall I proceed with booking?

USER: Ok, you can proceed with this ticket booking.

ASSISTANT: Your ticket is altered.

USER: Thank you for your service.