You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I guide you?

USER: Myself Amanda Thomas as I need to make a journey to Dallas & Fort worth but due to some reason I could not go, can you change the reservation to my planned dates?

ASSISTANT: Sure, I am glad to help you. Please give me a moment to check it.

USER: Thank you for understanding my concern, take your time.

ASSISTANT: Thank you for waiting, I have checked based on your request and it is showing that there is no reservation for the user name.

USER: That is ok, may be the reservation is not correctly reserved previously. Thank you for assisting me.

ASSISTANT: It's my pleasure to assist you and thank you for approaching our agency.