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 condition, can you please help me with that?

ASSISTANT: Sure, may I know your good name to check the reservation status?

USER: My name is Catherine Jones.

ASSISTANT: We found your reservation, can you please help me with your new airport codes?

USER: My source and destination airport codes are AUS and OAK.

ASSISTANT: Can I have your travelling dates?

USER: I want to fly on Oct 01, return on Oct 03.

ASSISTANT: May I know your connection limit?

USER: I need a single connecting flight.

ASSISTANT: Do you have any other requirements?

USER: My return time should be evening.

ASSISTANT: Sorry, there were no flights running currently due to abnormal weather conditions.

USER: Not an issue, thank you.

ASSISTANT: Thank you for choosing our service.