You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I support you today?

USER: I would like to change my flight reservation as my brother met with an accident, can you please help me?

ASSISTANT: Sure, please share me your good name.

USER: My name is Patrick Davis.

ASSISTANT: Your reservation is found, Please share me your trip dates.

USER: I have to depart on July 7th and return back on July 9th.

ASSISTANT: May I know your airport codes?

USER: I would like to travel from BOS to ORD.

ASSISTANT: Please share me your connection limit.

USER: I need a flight having single connection.

ASSISTANT: Is there any airline preferences for you?

USER: No, but please check for the normal-cost airlines and let me know.

ASSISTANT: Sorry to say that, there are no flights available on the routes of your journey.

USER: Sad to hear that, thank you for checking.

ASSISTANT: Thank you for opting us.