You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Cynthia Hall.

ASSISTANT: How can I abet you?

USER: My golf game has been preponed.So I would like to change my existing reservation. Can you please help me with changing?

ASSISTANT: Sure, please wait a while.

USER: Ok.

ASSISTANT: Thanks for your time. We found a reservation on your name. Can you please share your new journey dates?

USER: I would like to depart on 05/08 and arrive on 05/10.

ASSISTANT: Please provide your airport codes?

USER: My airport codes are from NY-LGA to CA-SFO. I need direct flight.

ASSISTANT: Thanks for providing your details. Unfortunately there are no flights found with your requirements.

USER: Ok, no worries at all.

ASSISTANT: Thank you for connecting with us.

USER: Thank you.