You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Jack Adams.

ASSISTANT: How can I help you?

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

ASSISTANT: Let me know your travelling dates?

USER: I would like to depart on Oct 26th and return on Oct 28th.

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

USER: Ok, I will find an another alternate way to complete my trip. Anyways, thank you for the information.

ASSISTANT: Thanks.