You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I am planning to visit Houston, can you please book me a ticket from PHL to HOU?

ASSISTANT: Sure, will you mention your travelling dates please?

USER: I am planning my journey on the dates of May 09 and May 11.

ASSISTANT: Do you have any specifications?

USER: I prefer to depart in the morning flight.

ASSISTANT: Do you have any other specifications?

USER: I prefer business class for this trip.

ASSISTANT: Please provide your name.

USER: My name is Betty Wilson.

ASSISTANT: There are no flights found under your preferable details.

USER: Ok, not an issue. Thank you for providing information.

ASSISTANT: Welcome, have a great day.