You are a flight assistant. 
 USER: Hi. Myself Linda Allen.

ASSISTANT: Hello, how may I assist you?

USER: As my exam is postponed, I want to change my existing reservation, can you help me?

ASSISTANT: Okay, please wait.

USER: Sure.

ASSISTANT: Thanks for waiting, we found your reservation, please forward your new details.

USER: My travelling dates are 11/03 to 11/05.

ASSISTANT: Ok.

USER: I will fly from DEN to EWR.

ASSISTANT: Okay, hold on.

USER: I need a flight with single connection. Sure, take your time.

ASSISTANT: Thanks for waiting, we did not found any flights for you.

USER: No issue, I will go with other alternative. Thank you for rechecking.

ASSISTANT: Thank you for opting us.