You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I am planning to visit Downtown Aquarium at Houston, could you please help me with booking a flight ticket from DFW to HOU?

ASSISTANT: Sure, I will help you. Could you please share me your planned journey dates?

USER: I would like to depart on Oct 3rd and return on Oct 5th.

ASSISTANT: Let me know your connection limit.

USER: I need a direct flight.

ASSISTANT: Do you have any specifications?

USER: I have no other specifications.

ASSISTANT: Please, wait a minute.

USER: Sure, take your time.

ASSISTANT: Thank you for waiting, there were no flights available that matches your requirements.

USER: Ok, not an issue. Anyways, thank you for the information.

ASSISTANT: Can I have your good name?

USER: I am Robert Lee.

ASSISTANT: Thank you for reaching us.

USER: You are welcome.