You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I want to change my existing reservation, due to bad weather conditions. Can you please help me to change my reservation?

ASSISTANT: Sure, we are here to help you.

USER: Thank you for the response.

ASSISTANT: May I know your good name please?

USER: Lisa Turner is my name.

ASSISTANT: Thank you for sharing your name, we found a reservation in your name. Can you share me your new journey dates?

USER: That's great to hear from you. My journey dates are July 26th and July 28th.

ASSISTANT: May I know your airport codes?

USER: OAK and LAX are my nearest airport codes.

ASSISTANT: Do you need any break in your journey?

USER: I prefer a direct flight for my journey.

ASSISTANT: May I know your depart and arrival dates?

USER: I would like to return in the morning time.

ASSISTANT: Do you have any other requirements?

USER: No.

ASSISTANT: Sorry to inform you that, there are no flights available with your requirements.

USER: Ok, not an issue. Anyways, thank you for the information.

ASSISTANT: Thank you for reaching us.