You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I guide you today?

USER: I have to change the return journey date in the previous ticket because I have another work in the same place. Can you please give me assistance to do that?

ASSISTANT: Sure, I would like to help you with that.

USER: Thanks a lot for your response.

ASSISTANT: Can you please share your name to proceed further?

USER: Sure, I am Carol Perez.

ASSISTANT: I am sorry to inform that there is no reservation found under your name.

USER: Oh! I think the ticket is not confirmed. Anyways thank you for your time.

ASSISTANT: Thank you for contacting us.

USER: You are welcome.