You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

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

ASSISTANT: Sure, can I know your travelling dates?

USER: I would like to depart on May 22nd and return on May 24th.

ASSISTANT: On which name should I reserve the flight ticket?

USER: Please make the reservation under the name Samuel Davis.

ASSISTANT: Do you have any connection limit?

USER: I am looking for a connecting fight.

ASSISTANT: Which class do you prefer?

USER: I am comfortable with any class.

ASSISTANT: Do you have any particular time for departing and returning?

USER: No, but I need a normal- cost airline.

ASSISTANT: Sorry, there are no flights found on given dates.

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

ASSISTANT: Thank you for reaching us.