You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I support you today?

USER: I would like to book a flight ticket from Houston, to visit Comic Con exhibition with my college Friend's and to exhibit my new experiment in Los Angeles. Will you please aid me in making a plane reservation?

ASSISTANT: Sure, please share me your travel dates.

USER: My depart will be on Oct 13th and return on Oct 15th.

ASSISTANT: Is there any class preferences for you?

USER: I will prefer to travel in an economy class.

ASSISTANT: Do you need direct flight or connecting flight?

USER: I need a connecting flight.

ASSISTANT: For booking, we need your good name. Please mention it.

USER: Daniel Thompson.

ASSISTANT: Is there any time concern for you?

USER: No, thank you for asking.

ASSISTANT: Please share me your airport codes.

USER: My source and destination codes are from HOU to LAX.

ASSISTANT: Sorry to say that, there are no flights available on the routes of your journey.

USER: Ok, no worries at all.

ASSISTANT: Thank you for opting us.

USER: Thank you for your service.