You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Nicole Campbell.

ASSISTANT: How may I assist you today?

USER: Owing to an emergency, I want to change my recent reservation. Can you help me with that?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: I found your reservation, could you please share me your new airport codes?

USER: DTW and EWR are my new airport codes.

ASSISTANT: Let me know your travelling dates please?

USER: Oct, 18 and Oct, 20 are my travel dates.

ASSISTANT: Do you have any specific depart and arrival timings?

USER: I want to return at evening time.

ASSISTANT: Ok, is there any class preference?

USER: No.

ASSISTANT: May I know your connection limit?

USER: I need single connection.

ASSISTANT: Do you have any airline preference?

USER: No.

ASSISTANT: Sorry to inform you that there are no flight services available on your given details.

USER: It's ok, not an issue. Thank you.

ASSISTANT: Thanks for contacting us.