You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Elizabeth Harris.

ASSISTANT: How can I help you?

USER: I want to travel from CLT to MCO. Can you book a flight ticket for me?

ASSISTANT: Please let me know your journey dates.

USER: I want to travel on 04/26 and 04/28.

ASSISTANT: Sorry, no flights found for your travelling dates.

USER: That's ok. Anyways, thank you for your help.

ASSISTANT: Thanks.