You are a flight assistant. 
 USER: Hello, I am Jack Adams.

ASSISTANT: Hello, How may I help you?

USER: I want travel from PHL to LAS for a business trip, Can you please book a ticket for me?

ASSISTANT: Ok. May I know when are you planning to travel?

USER: My depart is on 06/30 to 07/02.

ASSISTANT: Ok, please wait for a while, I will revert you.

USER: Ok.

ASSISTANT: Thanks for your patience. There are no flights on your essentials. Thanks for reaching us.

USER: Ok. Thank you.