You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Eric Brown.

ASSISTANT: How can I help you?

USER: I would like to visit Walt Disney World at Orlando, ORD. Can you please book me the ticket from Detroit, DTW?

ASSISTANT: Please help me with your travelling dates.

USER: I am planning to depart on 04/20 and would like to return on 04/22.

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

USER: Ok, not an issue. I will find any other mode of transport for my trip. Thank you for providing information.

ASSISTANT: Thank you.