You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I render you today?

USER: Due to inconvenience of my work, I want to change my reservation. Can you please help me for that?

ASSISTANT: Sure, we are here to help you.

USER: Thanks.

ASSISTANT: Can you please help me with your name?

USER: My name is Carolyn Thompson.

ASSISTANT: Please wait a minute.

USER: Ok, I will wait.

ASSISTANT: We found a reservation on your name, can you please help me with your travel dates?

USER: My travelling dates are Dec 02 and Dec 04.

ASSISTANT: May I know your boarding and landing points?

USER: My airport codes are BOS and LAS.

ASSISTANT: Do you have any specifications?

USER: I want to prefer prefer single connecting flight.

ASSISTANT: Ok, please wait a minute.

USER: Ok, I want to prefer normal cost airline.

ASSISTANT: Sorry to say that there were no flights found on your route.

USER: Anyway, thanks for the information.

ASSISTANT: Thank you for reaching us.