You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. Do you need any help from my side?

USER: The schedule of my business conference got changed, can you please help me in changing flight details?

ASSISTANT: Yes, I am glad to hep you and can you please mention your name please?

USER: Jason Collins here.

ASSISTANT: Thank you for your information, please wait for a while to search your name in our reservation portal.

USER: Sure, take your time.

ASSISTANT: Thanks for being oh hold for a while, I am unable to search your name in our reservation portal that there is no ticket booked previously on your name.

USER: That's ok, thank you for checking.

ASSISTANT: It's my pleasure to help you and thank you for utilising our service to your help.