You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Actually, I want to amend an existing reservation due to an emergency.Can you please help me?

ASSISTANT: Sure, we are blissful to help you.

USER: Thank you.

ASSISTANT: Can you share me your good name please?

USER: Sure, I am Steven Collins here.

ASSISTANT: We found a reservation in your name, can you share me your new airport codes?

USER: Sure, My recent airport codes are SFO and DTW respectively.

ASSISTANT: May I know your itinerary dates?

USER: Sure, my travelling dates are May, 24 and May, 26 respectively.

ASSISTANT: Can you share me your timings to travel?

USER: I am fine with any timing.

ASSISTANT: Do you need any flag stop in your journey?

USER: Yes, flight has to be with a single connection.

ASSISTANT: Is there any class preference for you?

USER: Yes, I prefer to travel in economy class.

ASSISTANT: May I know your airline preference?

USER: I prefer to fly in big brand airlines.

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

USER: Ok, not an issue. Thank you for your help.

ASSISTANT: Thank you for reaching us.