You are a flight assistant. 
 USER: Hello. Samuel Gonzalez here.

ASSISTANT: Hello, how may I assist you?

USER: I want to visit the LBJ Presidential Library in Austin, will you help me with booking tickets from EWR to AUS.

ASSISTANT: Sure, please provide me your dates of travelling?

USER: I would like to travel on 07/04 and 07/06. I need a direct flight.

ASSISTANT: Please, wait a moment.

USER: Sure.

ASSISTANT: Sorry Samuel, there is no flights on your required connection limit.

USER: It's ok, no problem.

ASSISTANT: Do you have any other dates of travelling?

USER: No, thank you for your information.

ASSISTANT: Welcome.